Why have forest fires in ponderosa pine forests become more damaging to that ecosystem than they were historically?a.Following a policy of fire suppression in these forests makes fires burn hotter.b.Fires in ponderosa pine forests are generally low-intensity fires.c.Following a policy of fire suppression in these forests clears out underbrush..d.Forest fires are a natural part of ponderosa pines forest ecosystems.
Which of the following is not a benefit of wildfires to ecosystems?a.habitat lossb.underbrush reductionc.new growthd.plant regeneration
Prescribed burns are used to _______. a. clear out undergrowth b. prevent larger forest fires c. manage forests d. all of the above Please select the best answer from the choices provided
How are the benefits of wildfires in deciduous and northern forests similar?a.increased tree quantityb.increased amount of lichensc.increased nutritional value of growth d.all of the above
Which of the following statements about the use of prescribed fires in the Everglades is true?a.It controls the amount of moisture in the environment.b.It controls the spread of exotic organisms.c.It helps maintain plant communities.d.All of the above
Soil _______ as a result of wildfires in grasslands.a.improvesb.degradesc.is unchangedd.is lost
How are forest fires beneficial to conifers like Jack Pines?a.Jack pine seeds are protected by forest fires.b.Pine cones are carried on the winds produced by forest fires.c.Forest fires release the seeds stored in Jack pine cones.d.All of the above.
How do wildfires help control plant disease?a.Wildfires are more likely to kill off plants that are likely to spread disease.b.Wildfires help control populations of fungi and insects that can lead to plant disease.c.Wildfires thin underbrush which leads to plant disease.d.All of the above
Which of the following statements about prescribed burns is true?a.Prescribed burns will always have detrimental effects on ecosystems, but should be used to protect homes.b.Prescribed burns are necessary for preventing natural wildfires.c.Prescribed burns can help maintain healthy ecosystems.d.None of the above
Fire ecology is _______.a.an old branch of scienceb.a way for scientists to prevent accidental wildfiresc.the study of how fire affects ecosystemsd.all of the above
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